I probably should have mentioned this earlier, but I kept forgetting - I'm not going to AX. I realised that while I do have the money, I'm going off to college on the other side of the continent in the fall, and thus should be responsible about my savings account, particularly as I'm not working full-time this summer. On the AB front, I'm going to keep the hotel room, whoever needs space can have it, and I'll just figure out cost-splitting after, I think. Costume-wise, I'm thinking Summoner Yuna, half-finished Ada (I'm not going to have time for all the accesories), and vol. 11 yukata!Tatsumi, because it's comfy and hasn't been worn to any cons yet.
As far as things being done on costumes - I got all the little semi-circles sewn on to the overrobe of WM Yuna, which leaves the cuffs, hood, boots, and front insert. The only one of those that'll take more than an hour or two is the hood, I think, which has more little fiddly bits. I've almost finished all the painting on Ada, though, and I may just sit down and do the rest before going to bed. Didn't get a chance to work on summoner Yuna, although there isn't much left to be done, but I did finally order the wig. Hopefully it will be here in time.
One quick largely spoiler-free KH2 note - Auron is the win. Now I crave Auron fic, and will probably go start re-reading Legendary Guardian.